mumbo jumbo
noun [ U ] informal uk/ˌmʌm.bəʊ ˈdʒʌm.bəʊ/ us/ˌmʌm.boʊ ˈdʒʌm.boʊ/
晦涩难懂的话；无意义的活动；繁文缛节
words or activities that seem complicated or mysterious but have no real meaning
You don't believe in horoscopes and all that mumbo jumbo, do you? 你不相信占星术和那套鬼话，是吧？